HXGN15-12SF6 Unit-Type AC Metal-Enclosed Ring Main Switchgear
ZN39 Indoor Vacuum Circuit Breaker
2.Ambient temperature: -40°C~+40°C (below 35°C within 24 hours)
3.Relative humidity: ≤95% (daily average) or ≤90% (monthly average)
4.Altitude: ≤ 1000m
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
1.ZN39 Indoor Vacuum Circuit Breaker: Reliable Power Protection for Modern Electrical Systems
Looking for a robust solution to safeguard your electrical infrastructure? The ZN39 Indoor Vacuum Circuit Breaker offers cutting-edge technology to ensure uninterrupted power distribution. Designed for demanding environments, this circuit breaker combines durability, precision, and adaptability—ideal for industries like power grids, industrial plants, and urban infrastructure. With certifications like IEC 62271-100 and CE, it meets global standards while excelling in seismic resistance, humidity control, and rapid interruption (≤15ms). Let’s explore how the product can elevate your operations.

2.Technical Specifications
- Rated Voltage: 12kV
- Ambient Temperature: -40°C to +40°C
- Relative Humidity: ≤95% (daily) / ≤90% (monthly)
- Altitude: ≤1000m
- Mechanical Operations: ≥20,000 cycles
- Breaking Time: ≤15ms
| project | unit | Electrical parameters | |||
| Rated voltage | kV | 12 | |||
| Rated insulation level | Rated lightning impulse withstand voltage (peak) | kV | 75 | ||
| Power frequency withstand voltage (1min) | 42 | ||||
| Rated short-circuit breaking current | kA | 20/25 | 31.5 | 40 | |
| Rated current | A | 630、1250 | 630、1250、1600、2000、2500、3150 | 1250、1600、2000、2500、3150 | |
| Rated thermal stable current (effective value) | kA | 20/25 | 31.5 | 40 | |
| Rated dynamic and stable current (peak) | 63 | 80 | 100 | ||
| Rated short-circuit closing current (peak) | 63 | 80 | 100 | ||
| Breaking times of rated short-circuit breaking current | times | 50 | |||
| Power frequency withstand voltage of secondary circuit (1min) | V | 2000 | |||
| Rated operating sequence | O-0.3-CO-180S-CO | ||||
| O-180S-CO-180S-CO | |||||
| Rated thermal stabilization time | s | 4 | |||
| Rated single / back-to-back capacitor bank breaking current | A | 630/400 800/400(40kA) | |||
| Mechanical life | times | 10000 | |||
3.Key Features & Advantages
1. Modular Spring-Operated Mechanism: Simplifies maintenance and reduces downtime with easy component replacement.
2. Seismic & Anti-Fouling Design: Reinforced brackets and high-creepage porcelain sleeves ensure stability in earthquake-prone or polluted environments.
3. Smart Compatibility: IoT-ready models (ZN39-S series) enable real-time condition monitoring.
4. Custom Configurations: Tailor terminal layouts, communication interfaces, and voltage ratings to regional needs.
4.Applications Across Industries
Be used in a wide range of industries.

Industrial Plants
Eliminate power factor penalties in CNC machines and assembly lines while handling surge currents up to 100x rated capacity.

Substation
Stabilizes substation voltage against harmonics and intermittent generation from renewable inverters.

Commercial Buildings
Retrofit aging systems in hospitals or malls with silent (<45dB), flame-retardant capacitors that meet NFPA 70 fire codes.
5.Built to Last: Manufacturing & Quality Control
Our ISO-certified facilities combine precision engineering with rigorous testing:
- Material Selection: Aerospace-grade alloys for contacts and insulation.
- Automated Assembly: Minimizes human error for consistent quality.
- Triple-Stage Testing: Simulates 20+ years of operation to validate durability.
6.Why Choose Us?
- Proven Expertise: Contributors to the National 863 Program with 15+ patents in switchgear tech.
- Global Compliance: Pre-certified units for faster market entry.
- Bulk Order Flexibility: Competitive pricing for 5,000+ unit orders and JIT delivery in <8 weeks.
- Lifetime Support: Multilingual manuals, CAD files, and 24/7 technical assistance.
7.Partner With Confidence
Trusted by distributors in 30+ countries, our product delivers unmatched ROI through reduced downtime and compliance-ready designs. Whether you’re serving price-sensitive emerging markets or tech-driven regions, our ZN39-E (Economy) and ZN39-S (Smart) series cater to every need.



8.FAQs
1. What certifications does the ZN39 have?
It meets IEC standards.
2. Can it handle seismic zones?
Yes—its reinforced structure is tested for 8+ magnitude earthquakes.
3. What’s the lead time for bulk orders?
Standard orders ship in 6–8 weeks; expedited options available.
4. Is customization possible?
Absolutely! Adjust voltage ratings, communication protocols, or terminal types.
9.Contact Us
Email: xaxd_electric@163.com
Let’s discuss how the ZN39 Indoor Vacuum Circuit Breaker can meet your clients’ demands for reliability and value.
10.Factory Show


11.Equipment Display

12.Application Cases
State Grid systems, power engineering, steel and metallurgy, petrochemicals, rail transportation, energy and water conservancy, construction, environmental protection, and renewable energy sectors
13.Team and Exhibition

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